Bag machine



June 10, 19:30. A. POTDEVIN 1,762,350

' BAG MACHINE Filed March 5, 1928 2 Sheets-Sheet l ATTOR EYS.

June 10, 1930. A. POTDEVIN BA-G MACHINE Filed March 3, 1928 2 Sheets-Sheet 2 INVENTOR wag 2W2 ATT1NEYS Patented June 10, 1930 UNITED STATES PATENT OFFICE ADOLPH POTDEVIN, F GARDEN CITY, NEW YORK, ASSIGNOB TO PO'IDEVIN MACHINE I COMPANY, OF BROOKLYN, NEW YOBK,,A CORPORATION OF NEW YORK BAG MACHINE Application filed larch 3,

My invention relates to an improvement in machines for making paper bags. In such machines the material from which the ba s are to be manufactured is fed customari y into one end of the machine, where paste is applied to the edges of the paper, the paper then being folded over and the over-lapping edges pressed together to form a seam. This provides a tubular formation which is next cut to length, depending, of course, upon the type of bag being made. The tube next passes to bottoming mechanism where the bottom is formed. The machines are full automatic in operation.

It has been found, however, in the manu-. facture of bags on such machines that occasionally the seams will open during manipulation of the tubes in the bottoming operation, which unfits-the bags for service where bagging of finely divided material is desired,

and the machines being automatic in operation this may not be discovered until a great number of bags have been run through.

One of the objects of my invention, therefore, is the provision of a bag machine in which means are provided whereby the tubes are so treated after leaving the tube-forming mechanism and before reaching the bottoming mechanism that opening of the seams during the bottoming operation is avoided.

. In general, my invention provides means intermediate the tube-forming mechanism and the bottoming mechanism for passing or transferring the tubes from the tube-forming mechanism to the bottoming mechanism, the

seams of the tubes durin such transfer being subjected to ressureby the transferring mechanism and the paste in the seams allowed to dry and set sufiiciently to prevent possibility of the seams opening during the bottoming operation.

In the accompanying drawings Fig. 1 is a part sectional elevational view of my invention;

Fig. 2 is a plan view of the apparatus of Fig. 1; a 1

Fig. 3 is a detail view of certain mechanism employed adjacent the bottoming end of the machine;

Fig. 4' is a detail view showing one stage of cut off to the desired length.

1928. Serial No. 258,876.

the passage of the tubes through the apparatus; while Fig. 5 is a view in perspective of a tube of paper prior to the bottomlng operation showing the manner inwhich the seam may open during the bottoming operation, a defect which, as above pointed out, is remedied by the presentinvention.

Referring now to the drawings in detail, the paper or other material from which the bags are to be made is fed from a roll into the machine, pasted, and folded-over so that the edges overla to form a seam extending longitudinally o the tube. Inasmuch as the mechanism necessary to the performance of this much of the bag forming operation is well known in this art-the same has not been illustrated and will not be referred to in detail. Thematerial in tube form is next passed through cutting off mechanism, shown more or less diagrammatically at 2 in the accompanying drawings, where the tube is It may be well to mention at this the tubesmay be made with a center seam or with a side seam, as the case may be, the apparatus constituting the present invention being adapted for use in the making of both types of ba Beyond 516 cutting ofi mechanism a pair of positively driven dischar e 'orvdelive rolls 3 and 4 are provided, t e tubes after being cut to length passing between these rolls and being discharged thereby successively upon the upper lead of a positively driven conveyer belt 5, which constitutes a part of my improved mechanism. The conveyer belt is endless and is mounted on a series of rollers 6, 7, 8,9, 10 and 11, the rollers 10 and 11 being so disposed relatively to each other that thedirection of travel of the conveyer belt with respect to the direction of travel of that portion of the belt lying be tween the rollers 6 andll is reversed.

The paper tubes as they are discharged by the rolls 3 and 4.- are deflected by members 14.- so as to be" deposited properly upon the conveyer belt. 12 designates tubes which have been deposited upon the belt, while 13 designates a tube being discharged from the point thatrollers 3 and 4. i The tubes have been illustrated as lying upon the belt in overlapping lation of the tubes may be preferable in many instances, inasmuch as the slower the conveyer belt is caused to travel relatively to the delivery of the tubes by the rolls 3 and 4, the more time will elapse between the delivery of the tubes by the rolls 3 and 4 to the conveyer'belt and the discharge of these tubes to the bottoming mechanism, and hence the paste of the seams in the tubes will have that much longer to dry and set.

At this point I may refer to the illustration in Fig. 5, in which 15 designates a tube.

corresponding to the tubes 12 and 13 in Fig. 1,

'. from which illustration it will be seen that the paperor other material constituting the tube is folded over so that the edges overlap as indicated at 16 to provide a seam extending longitudinally of the tube, the overlapping edges of the paper, as will be understood, previously having been pasted. This figure illustrates the seam as opened at 17 due to manipulation of the tube in the bottoming mechanism, and it is the purpose of. this invention to prevent this occurring. Itwill be understood, of course, that the seams of the tubes as the tubes are delivered from the rolls 3-and 4 have been perfectly formed.

A short distance from the receiving end of the conveyer belt 5, i. e., the end passing about the roller 6, I provide a positioning roller 18 mounted in suitable adjustable bearings 18* and positioned just above the upper lead of the conveyer belt. As the tubes are deposited on the conveyer belt 5 by the rollers 3 and 4 this roller 18 which is adjustable according to length of tube will retard tube and position it properly on belt 5.

The tubes after passing beneath the roller 18 are carried by the conveyer belt about a large roller 11 uring which time they are subjected to an appreciable pressure owing to the fact that they are gripped or squeezed between the belt and the roller in their passage about the roller, as will be obvious. As

I the tubes complete their travel about the roller llfthey are discharged upon a plate 19, bemg deposited upon thisplate in inverted positlon with respect to the position they occupy 1 in traveling to the roller 11. This plate 19 is immediatelyabelow the belt 5 as will be seen from Fig. 1, so thatthe tubes will be pushed along theplate-until they are caused to enter between the belt? andfiaf'pair of conveyer.

belts 20 which are mounted on rollers 21, 22, 23 and 24, these rollers being so disposed that the belts are led about a portion of the periphery of-the roller 10'and in close proximity to the belt 5. -By this construction, therefore, the tubes are carried between the belts 20 and 5 around a portion of the periphery of the roller 10, being finally discharged at the point 25 from between the belts, their further or continued transfer being effected by the belt 5 only.

As will be seen from Fig. 1 and as will be obvious, the tubes which were again subjected to pressure, by the action of the belts 20 and 5 and the roller 10,'Wlll continue their travel toward the bottoming mechanism until they arrive beneath the adjustable presser roller 26 which lies immediately above the conveyer belt 5. The tubes are discharged from the conveyer belt 5, by the roller 26, between a positively driven roller 27 and driven sector rollers 28. The peripheral speed of the sector rollers 28 is such, when the tubes are being transferred in-overlapping relation, as j I to accelerate the rate of travel of the leading or lowermost'tube of the load with respect to the other tubes,so as to withdraw such tubes successively from beneath the following tubes and move the same along a plate 30 and between rollers 31 by which the tube is delivered upon aframe 32 alongwhich the tubes are caused to pass to the bottoming mechanism, as will be presently described. A leading tube just being picked up by the sector rollers 28.has been. designated 29. The rollers 28 are made in the form of sectors, so as to permit of the tubes passing into position prop* erly. between the rollers 28 and the roller 27 before being picked up. The roller 26 which is adjust-able is adjusted so that when sector roller 28 picks'up the leading tubeshown as 29 the rear end of tube 29 has just passed under the center or grip of before men- ,tionedroller 26, this prevents pullingahead of following tubes until desired.

Positively driven sprocket chains 33 mounted on sprockets 34, 35 and 36 are provided, these chains being in such position thereon and carry a series of fingers 38, these fingers projecting upwardly as will be seen a from Fig. 1 between the sides of the frame, and so timed as to engage the rear end of the that the'leads 37 thereof travel parallel to tubes as they are deposited-upon the frame.

A tube. 39 is shown on the frame in Fig. 1 and an inspection of this figure will show that one pair of the fingers 38 will shortly engage this tube to move the same. to the left, as viewed in Fig. 1, toward the bottoming mechanism; v 5

4 As" the tubesare moved positively along the frame 32 by the fingers 38 they are finally from the frame 32 and passed into the bottoming mechanism (not shown). To prevent undesired or premature movement of the tubes from the frame 32 a stop 42 is provided adjacent the discharge end of the frame. This stop is attached to an arm 43 which is pivoted at 44 and carries a cam follower 45 cooperating with a cam 46 on the shaft 47-on which the rollers 41 are mounted.

positioned on the shaft 47 with respect to the positioning of the rollers 41 that the stop 42 will be lifted at the proper instant by the action of the cam 46 to permit of the passage of a tube between the rollers.

The main drive shaft for the mechanism abovedescribed is designated 48, this shaft,

being geared to a drive shaft 49 extending lengthwise of the machine and geared by worm and gear 50 to a shaft 51 extending transversely of the machine. This shaft 51 carries a gear 52 meshing with an intermediate gear 53 on an adjustable arm 54 on the shaft 55'. --This shaft 55 also extends trans- IVersely of the machine and carries the roller 11. which roller, as above pointed out, is one of the rollers carrying the conveyor belt The'shaft 55 is provided with a gear 56 meshing with the intermediate gear 53. This gear 56 also drives a gear train composed of gears 57 and 58, the latter meshing with a gear 59 on the shaft 60 on which shaft is mounted the roller 10. This mechanism,

- therefore, provides a positive drive for the 1 tion.

rollers 10 and 11 and a drive for the conveyor belt 5 as well as. the conveyor belts 20, In or- The sectors 28 are mounted on shaft 61 [ex-- tending transversely of the machine and are driven from the gear 52A on the shaft 61. The gear 52A in turn is'driven from a gear 63 on the shaft of the roller 27, this gear be ing driven from intermediate gear 64. "The gear 64 receives its drivefrom gear 65 on the shaft 66, carrying the sprockets 35 driven by the chains 33. These chains, and hence the shaft 66, are driven by the sprockets 34 on the shaft 67 which is driven from the gear This cam is so.

relative transferred.

68 through intermediate gear 69, driven by the gear 70 on the shaft 62. This shaft 62 receives its drive from the shaft 49 and the drive for the bottoming mechanism, not shown. The rollers 31 are geared together and driven by the intermediate gear 71 which is in mesh with the gear 65 on driven shaft 66.

From the foregoing, therefore, it will be seen that I have provided means intermediate the tube-forming mechanism and the bottoming mechanism in a bag forming machine for transferring tubes from the tube-forming mechanism to the bottoming mechanism in which the speed of the transfer mechanism can be adjusted as desired relatively to the speed of the tubing mechanism and bottoming mechanism so as to convey the tubes in overlapped position or in end to end position just as desired, but in any event to consume sufficient time in the transfer operation to enable the paste of the seams to dry and set sufficiently to prevent the seams opens ing during the bottoming operation. It will be seen also that my improved mechanism provides for subjecting the seams to pressure during their transfer which further aids in preventing accidental opening of the seams.

It is obvious that modifications may be i made in the aparatus above described within the scopeof my invention.

\Vhat I claim is:

1. In a bag forming machine comprising lube-forniii'ig mechanism and bottoming mechanism. intermediate means for transferring tubes from the tube-forming mechanism to the bottoming mechanism, the speed of said transferring means being adjustable relatively to said mechanisms.

2. In a bag forming machine, means for transferring material from the tube-forming mechanism of the machine to the bottoming mechanism, and means for varying the speed of said mechanism relatively to the speed of.thertube-forining and bottoming mechanisms,

3. In an automatic bag forming machine comprising tube-forming mechanism and bottoming mechanism, and conveyor mechanism intermediate the tube-forming mechanism and the bottoming mechanism for effecting a transfer of material from the former to the latter, the speed of said eonveyer mechanism being adjustable relatively to the tube-forming and bottoming mechanisms to varythe positions in which the tubes are 4. In a bagforining machine comprising tube-forming mechanism andv bottoming mechanism, intermediate mechanism for transferring tubes from the tube-forming mechanism to the bottoming mechanism, said intermediate mechanism effecting a positive progression of the tubes throughout a portion of their travel. V 5. In a iiia'chiiie for forming bags the coinfecting a transfer of the tubes from the first mentioned mechanism to the second men tioned mechanism in overlapped relation' bination of tube-forming and cutting-off "mechanism, bottoming mechanism, intermethroughout a portion of their travel.

6. In a machine for forming bags the combination of tube-forming and tube cuttingofi mechanism, bottoming mechanism, and

means for effecting a transfer of tubes from the tube-forming and cutting-off mechanism to the bottoming mechanism, said transferring mechanism efi'ecting'a transfer of the tubes in overlapped relation throughout the first portion of their travel, and means for effecting transfer of the tubes singly in the final portion of their travel.

'7. In a machine for forming bags the combination of tube-forming and tube cuttingoff mechanism, bottoming mechanism,:intermediate transfer mechanism for efiecting transfer of the tubes from the first mentioned mechanism to the second mentioned mechanism, the tubes being transferred throughout a portion of theirtravel at a rate diflering from their rate of travel throughout the'other portion of their travel. v

8. In a machine for forming bags the combination of tube-cutting-ofi mechanism, bot; toming mechanism, and transferring means for effecting transfer of tubes from the tubecutting-off mechanism to the bottoming mechanism at variable speeds.

" 9. In a machine for forming bags the combination of tube cutting-ofi mechanism, bottoming mechanism, means for effecting transfer of tubes from the tube-cutting-o'ff mechanism to the bottoming mechanism. and means in the path of traveljo'f the tubes being transferred? for accelerating the tubes indi vidually with respect to the following tubes.

10. In a machine for forming bags, tube cutting-off mechanism transfer mechanism for transferring the ,cut off bag tubes from the cutting-off mechanism to the bottoming mechanism of the machine, and a roller cooperating with the tubes while their transfer is being effected, the peripheral speed of which is in exces's of the linearspeed at which the tubes are brought thereto; A

11. In a machine for forming bags, the combination of tube cutting-off mechanism and bottoming mechanism, transfer mecha- ,nism for transferring bag tubes from the cut ting-off mechanism toward the bottoming mechanism in overlapping relation, and a sector roller in the path. of travel of the over! forming mechanism to the bottoming mech-' es singly to withdraw the lowermost tube 7 from beneath the overlapping tubes.

. 12. In a machine forforming bagsthe combination of tube-formin and cutting-off mechanism, bottoming mechanism, intermediate-means for transferring tubes from the tube-forming mechanism and cutting-off mechanism to the bottoming mechanism, said means operating to effect during the transfer a reversal in the direction of travel of the tubes.

13. In a machine for forming bags the com- 15. In a machine for forming bags thecombination of tube-forming and cutting-off mechanism, bottoming mechanism means for transferrlng-bag tubes from the tube-formlng and cutting-off mechanism to the bottoming mechanism, and comprising a belt conveyer, and a pair of cooperating rollers, one of which is segmental, for. receiving/the tubes as they reach the end'of the belt conveyer to effect I further travel of the tubes toward the bottoming mechanism.

16. In a machine for forming bags and comprising tube-forming mechanism and hottomingmechanism, intermediate means for effecting transfer of tubes from the tubeforming mechanism to the bottoming mechanism, and comprising means adjacent thebottomin mechanism for positively advancing the tu%es individually.

17. In amachine for forming bags, means for transferring bag tubes from the tubeforming portion of the machine to ,the bott'oming mechanism, and comprising means adjacent the delivery end of the transfer mechanism for effecting individual and positive advance of the tubes, and stop mechanism 1 cooperating with said positive advancing means and "operating in timed relationtherewigh to prevent premature advance of the tu es.

" 18. Ina machine for forming bags and comprising tube-forming mechanism and bottomlng mechanism, mtermedlat'e'means for effecting transfer of tubes from. the tubeanism, and comprising positively'driven fingers adjacent the bottoming mechanism for effecting individual and positiveadvance of belt and one of said mechanisms, intermediate means for effecting continuous transfer of bag tubes from the tube forming mechanism toward the bottoming mechanism, a positively driven chain adjacent the bottoming mechanism positioned sothat one lead thereof moves in the desired direction of travel of the tubes, and fingers carried by said chain for engaging the tubes successively to advance them toward the bottomin mechanism.

20. In a machine for forming bags and comprising tube-forming mechanism and bot- ,toming mechanism, intermediate means for transferring tubes from the tube-forming mechanism to the bottoming mechanism and adjustable to transfer the tubes in spaced relation or in'overlapped relation.

21. In a machine for forming paper bags and comprising tube-forming mechanism and bottoming mechanism, intermediate transfer mechanism comprising a conveyer, and an adjustable positioning roller cooperating therewith and mounted adjacent the delivery of the tube-forming mechanism.

22. In a machine for forming paper bags and comprising tube-forming mechanism and bottoming mechanism, means for transferring tubes from the formerto the latter and comprising a belt, a sector roller for receiving tubes from said belt, and an adjustable roller mounted adjacent said sector roller and cooperating therewith to control the proper delivery of tubes successively from said belt. 23. In a machine for forming bags and comprising tube-forming mechanism and bottoming mechanism, a belt conveyer intermedi- "gate said mechanisms, a deflector adjacent the iii tube-forming mechanism for deflecting tubes being discharged from the tube-forming mechanism upon said belt conveyer, rollers about which said belt conveyer is trained, the tubes being conveyed by the belt being pressed throughout a portion of their travel between the belt and one of said rollers.

24. In a machine for forming bags the combination of tube-forming mechanism and bottoming mechani'sm'and means intermediate said mechanism for pressing the seams of the tubes in the passage of the tubes to the bottoming mechanism, said pressing means comprising a belt and a roller about which the belt is trained, said belt carrying the tubesto be pressed between one face thereofand the face of said roller.

25. In a machine for forming bags and comprising tube-forming mechanism and bottoming mechanism, tube pressing means intermediate the tube-forming mechanism and the bottoming mechanism and comprising a belt conveyer, a deflector adjacent the tubeformin mechanism for deflecting the tubes being ischarged therefrom upon the conveyer and an adjustable positioning roller cooperating with said deflector.

26. In a bag forming machine comprising tube forming mechanism and bottoming mechanism, means intermediate the tubeforming and bottoming mechanisms for transferring tubes from the former to the latter and to press the tubes while effecting their transfer, said intermediate mechanism comprising a belt conveyer, two rollers about which the conveyer passes, said conveyer and rolls being so disposed that tubes upon the conveyer are passed about one of said rollers between the conveyer and the face of said roller, and a second belt cooperatin with said conveyor and disposed adjacent t e second roller, the tubes after passing between the conveyer and the first roller, passing between the conveyer and said belt about the periphery of the second roller.

27. Bag forming mechanism comprising tube-forming mechanism and bottoming mechanism, pressing means intermediate said mechanisms and comprising two positively driven rollers travelling in opposite directions and a belt conveyer on which tubes leaving the tube-forming mechanism are deposit ed and carried by the said conveyer about said rollers, the tubes in passing about one of said rollers being carried between the conveyer and the periphery of the roller, a drive shaft for driving the tube-forming mechanism, geared to said rollers, and means for varying the speed of rotation of said rollers without varying the speed of said drive shaft thereby to vary the speed of the conveyer with respect to the tube-forming mechanism. I

28. In a machine for forming bags and comprising tube-forming mechanism and hottommg mechanism, positively driven fingers adjacent the bottoming mechanism for effecting individual and positive advance of tubes formed in the tube-forming mechanism toward the bottoming mechanism and a cam controlled stop adjacentthe bottoming mechanism for re ulating the movement of the tubes into the bottoming mechanism.

29. In a machine for forming bags the combination of tube-forming mechanism and hottoming mechanism, positively driven fingers adjacent the bottomingmechanism for advancing tubes formed in the tube-forming mechanism into the'bottoming mechanism, a stop adjacent the bottoming mechanism and a cam driven in timed relation to the bottoming mechanism for controlling said stop thereby to control the movement of the tubes into the bottoming mechanism.

30. In a, machine for forming bags, the combination of tube cutting-off mechanism, bottoming mechanism, and means intermediate the tube cutting-off mechanism and the bottoming mechanism for pressing the seams of the tubes in their passage to the bottoming mechanism.

31. In a machine for formin bags, the combination of tube forming mechanism and bottoming mechanism, and means intermediate the tube forming mechanism and the bottoming mechanism for transferring the tubes from the tube forming mechanism to 5 the bottoming mechanism and for pressing the seams of the tubes while being transferred.

This specification signed this 1st day of March, 1928. I

ADOLPH POTDEVIN. 

